@leomistico I have to disagree with you there. Personally, i was very excited when I found out Bolas was spying on the Phyrexians. Then again, that may just be born from my hatred of Phyrexia for messin up Mirrodin.

OK- so here's my review for Tezzeret, outside the context of combo and block-specific synergy:

Anyone who rates Planeswalkers by reading their casting cost and their ultimate and then stopping is being a little short-sighted. I can already tell you that Sorin's best ability is his middle one. Most planeswalker's best stuff is in the middle, in fact. Ultimates are great for finishing the game, but it's not until you see someone minus 3 one Planeswalker, plus 2 another one, and plus 2 a third that you realize how great these 'free' utility spells are.

Tezzeret's +1 ability IS useful outside the context of an artifact deck. You can still decide that you just want dig really deep for that one single artifact in your deck to kill someone with, like Wurmcoil Engine.

Tezzeret's -2 ability is gold because of it's dumbly good positive interaction with Inkmoth Nexus. Throw those two in a deck with no other artifacts, and you have an Infect Win Con as an alt game plan.

Turn your Memnites and Ornithopters into sizeable creatures. Turn your opponent's artifacts into creatures for your removal spells. Obliterate them with Tezzeret's ultimate using Proliferate or simply the first ability (while also protecting him for one turn, of course). His first ability is somewhat of a double-edged sword - you can dive fairly deep into your deck and pinch an artifact card of your choice, but you may end up having to place powerful creatures or spells on the bottom your library, which may be too big of a drawback.

Regardless - he's very balanced, yet flavorful and useful, but unlike certain other Planeswalkers, he's really meant to be played just to be removed shortly after (like Sarkhan the Mad or possibly Elspeth Tirel). Might not see too much play in certain formats, but for many black/blue artifact decks, he'll be a staple.

However I'm quite annoyed about Nicol Bolas... He is in every storyline since Alara and it was in Time Spiral too (even I think only as a card...). This block should have been the rebirth of Phyrexia, the best villain in Magic (and the most rappresentative), so why put Bolas too? I think they are stressing too much this character and I don't even see a reason. They should leave Bolas at home and let Phyrexia spread its desease everywhere! Ok, maybe not so much, but I think that Phyrexia is such a great villain that Magic doesn't need a second one... I only hope that Bolas will be infected by the Phyrexian oil...

Back to the card, I just love the +1 Impulse-style ability... The second and third ability ... (see all)